The stainless steel assembly screws are used for attaching various accessories to a TransPac harness or to a hard backplate (such as lift bag pouches, suit inflation mounting systems and sidemount buttplates). They can also be used to attach an aircell to your TransPac (caution: may scratch tank paint). Designed to fit through a 3/8 hole, the Stainless Steel Assembly Screws include O-rings that create friction to help keep the screw in place. Sold as a set of two.